Hi Dr. Kellon, here’s what I came up with: 

12 lb Hay*** = 11.4 Mcal
1 cup (weighed 5.5 oz) Teff Grass Pellets** = 0.325 Mcal
1.5 carrots* = 0.150 Mcal
2 TBSP fenugreek powder = 0.072 Mcal
Safe Treats* = 1 Mcal
Total ~ 13 Mcal per Day

* = Estimated
** = Info from EquiAnalytical report I found in feed folder
*** = Hay is soaked all meals (not sure that impacts calories much) 
--
J.Green 
MA, USA
2021
https://ecir.groups.io/g/CaseHistory/files/Fergus%20Case%20History
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